Winchester Municipal Utilities March 6, 2014 Introduction - - PowerPoint PPT Presentation

Winchester Municipal Utilities March 6, 2014

• Introduction
• Basis for Design Capacity
• Raw Water Supply
• Raw & Finished Water Transmission Mains
• Hydraulic Analysis
• Water Treatment Plant
• Conclusions & Recommendations
• Schedule

Introduction

 Technical Memorandum #1 presents the following

results & recommendations:

 Reviews past studies, including the 2009 Hazen &

Sawyer (H&S) Water System Planning Study (WSPS), and a series of technical memoranda prepared by Black & Veatch, Commonwealth Technology and Baldwin Engineering

 Evaluates and recommends raw water supply

alternatives

Introduction

 Technical Memorandum #1 presents the following

results & recommendations:

 Evaluates and recommends raw water intake and pump

station improvements

 Evaluates and recommends raw and finished water

transmission main improvements

 Provides an updated opinion of probable construction

cost and schedule for the proposed water system improvements

Basis for Design Capacity

 Scope of TM#1 did not include a detailed evaluation of

existing water demands

 TM#2 prepared in 1997 evaluated population projections

and future demands through the year 2000

 TM#4 projected water demands through 2020

 H&S study reports actual water demands, “have not

achieved the projected demands from the 1997 TM”

Basis for Design Capacity

 H& S study indicates ultimate design capacity of the

new WTP to be 12.0 mgd

 Recorded maximum daily water demands have

exceeded 5.0 mgd since 2005

 WMU has committed to provide additional water to

local industry in the amount of 1.0 mgd

Basis for Design Capacity

 Bell recommends the first phase of construction

include a design capacity of 9.0 mgd

 Allows for further residential & industrial growth  Includes incremental increases of 3.0 mgd over 2 phases

which is more practical and economical

 Current bidding climate and economy has resulted in a

flat line of recent bidding and bonding for treatment facilities

Kentucky River Pool 10

 The Kentucky River is and

will remain the primary source of drinking water for WMU’s system

 WMU is permitted by KY

DOW to withdraw 15.0 million gallons per day (mgd)

Carroll Ecton Reservoir

 Currently supplemented by the Kentucky River Intake

Pump Station

 Leaking impoundment structure

 Amount of leakage unknown, estimated over 1.0 mgd  Geotechnical & structural investigations required to

determine cause of leakage and required improvements

 Continued recreational use:

 Pumping to supplement water loss will be required  Power costs estimated to be approximately $38,281 per year at

current rates

Carroll Ecton Reservoir

 Continued use as backup water supply:

 Water quality is acceptable during colder months  Thermal stratification and oxygen depletion occur in

warmer months

 Aeration & mixing

system would be recommended at an approximate cost

• f $500,000

Carroll Ecton Reservoir

 Raw water is currently pumped through an 18-inch raw

water transmission main to maintain Reservoir levels

 Existing transmission main would need to serve dual-

purpose

 Water supply line transporting water from the Kentucky

River to the Reservoir

 Reverse flow and transport water from the Reservoir to

the new WTP site

Carroll Ecton Reservoir

Item Description Estimated Cost Power Cost to Supply 1.0 mgd to Carroll Ecton Reservoir $38,281/Year Project Costs for Improvements to Maintain Backup Water Supply $2,188,000 Summary of Project Costs – Carroll Ecton Backup Water Supply

Raw Water Intake & Pump Station

 Existing raw water intake structure was designed to

pump 15.0 mgd with four pumps in service

 To reliably pump 9.9 mgd to the new WTP an

additional pump similar to the existing pumps needs to be installed

 When demands require more than 9.9 mgd, a fourth

pump will need to be installed to maintain redundancy in the system

Raw Water Intake & Pump Station

Item Description Estimated Cost Installation of Vertical Turbine Pump & Appurtenances $600,000 Electrical, Control & HVAC Improvements $440,000 Project Development (25%) $260,000 TOTAL OPINION OF PROBABLE PROJECT COSTS $1,300,000 Summary of Project Costs – Raw Water Intake Improvements

*Project development costs are based on a percentage of construction costs.

Recommendations

 We recommend the following raw water intake

improvements:

 Install a third duty pump  Install a second transformer  Install a soft starter for Pump #3  Install a fused switch to power the future Pump #4

starter

 Upgrade the HVAC systems  Install a pump control valve in lieu of a VFD

Raw Water Transmission Main

 Alternative Evaluation

 Velocities (6.0 mgd, 30-inch, < 2 fps)  O&M requirements  Constructability  Capitol cost  Present worth

 Recommendations

 Construct 12,000 l.f. of 24-inch ductile iron pipe

Raw Water Transmission Main

Item Description Estimated Cost Installation of 12,000 l.f. of 24-Inch Ductile Iron Pipe $2,220,000 Project Development (25%) $550,000 TOTAL OPINION OF PROBABLE PROJECT COSTS $2,750,000 Power Costs $554,683/Year Salvage Value @ 50 Years $0 Present Worth $14,665,000 Summary of Project Costs – 24-Inch Ductile Iron Raw Waterline

*Project development costs are based on a percentage of construction costs.

Finished Water Transmission Main

 Alternative Evaluation

 Velocities (6.0 mgd, 30-inch, < 2 fps)  O&M requirements  Constructability  Capitol cost  Present worth

 Recommendations

 Construct approximately 36,000 l.f. of 24-inch ductile

iron pipe

Finished Water Transmission Main

Item Description Estimated Cost Installation of 36,000 l.f. of 24-Inch Ductile Iron Pipe $6,660,000 Project Development (25%) $1,665,000 TOTAL OPINION OF PROBABLE PROJECT COSTS $8,325,000 Power Costs $580,700/Year Salvage Value @ 50 Years $0 Present Worth $20,798,000 Summary of Project Costs – 24-Inch Ductile Iron Finished Waterline

*Project development costs are based on a percentage of construction costs.

Hydraulic Analysis

Location Raw Water Transmission Main Pressure (psi) at RWI 24-Inch 30-Inch 24 & 30-Inch RWI – Ex. WTP @ 6.6 mgd 175 N/A 171 RWI – New WTP @ 6.6 mgd 158 155 N/A RWI – New WTP @ 9.9 mgd 165 158 N/A Hydraulic Characteristics for Raw Water Pipeline Alternatives

 Existing pressure at RWI  215 psi  Flow control valves eliminate negative pressures  Air release valves required  Surge control valve at RWI to reduce pressure surges

Hydraulic Analysis

Location Finished Water Transmission Main Pressure (psi) at Bypass Connection

• Ex. 12” & 18”
• Ex. 18” &

New 24”

• Ex. 18” &

New 30”

• Ex. WTP @ 3.9 mgd

52 56 56

• Ex. WTP @ 6.0 mgd

N/A 67 68 New WTP @ 6.0 mgd N/A 67 68 New WTP @ 9.0 mgd N/A 95 95 Hydraulic Characteristics for Finished Water Pipeline Alternatives

 Existing pressure at Bypass  52 psi

Recommendations

 We recommend the following transmission main

improvements:

 Division A – Raw Water Intake to New WTP Site

 Install approximately 12,000 l.f. of 24-inch ductile iron transmission

main  Division B – New WTP to Existing WTP

 Install approximately 21,000 l.f. of 24-inch ductile iron transmission

main  Division C – Existing WTP to Bypass

 Install approximately 15,000 l.f. of 24-inch ductile iron transmission

main

Water Treatment Plant

Opinion of Probable Project Costs – New 9.0 mgd Winchester WTP

*Project development costs are based on a percentage of construction costs.

Item Description Estimated Cost Treatment Processes & Facilities $17,515,000 Site Work & Yard Piping $1,571,000 Electrical, Instrumentation & Controls $3,859,000 HVAC, Fire, Plumbing & Miscellaneous $915,000

TOTAL OPINION OF PROBABLE CONSTRUCTION COSTS

$23,860,000 Project Development (25%) $5,965,000 TOTAL OPINION OF PROBABLE PROJECT COSTS $29,825,000

Recommended Improvements

Item Description Estimated Cost

Raw Water Intake & Transmission Main Improvements $9,920,000 New 9.0 mgd Water Treatment Plant $23,860,000 TOTAL OPINION OF PROBABLE CONSTRUCTION COSTS $33,780,000 Work Orders No. 7 & 8 Engineering Fees* $875,000 Project Development Costs (25% of WTP) $5,965,000 TOTAL OPINION OF PROBABLE PROJECT COSTS $40,620,000 Opinion of Probable Project Costs – Recommended Improvements

*Fees associated with RWI & Transmission Mains.

Recommended Improvements

 Opinion of Probable Project Costs Including Carroll

Ecton

$42,370,000

 The estimated project development costs of $5,965,000

include the following associated with the WTP:

 Construction contingency  Allowances  Engineering fees  WMU costs

Schedule

 Raw & Finished Water Transmission Main

 Preliminary Design Phase

• Nov. 1, 2013 – Dec. 31, 2013

 Submit Draft Technical Memorandum

February 3, 2014

 Submit Encroachment Permits

February 3, 2014

 Meeting with WMU to present Final TM

February 14, 2014

 Submittal to KY Division of Water

February 28, 2014

 TM Presentation to WMU Board

March 6, 2014

 Submit Environmental Permits

March 7, 2014

 Public meeting to obtain easements

March 28, 2014

 Conduct Geotechnical Investigations

Start March, 2014

 Final Design Phase

January 1 – June 14, 2014

 Advertising / Bidding Phase

June 14 – July 8, 2014

 Award Construction

August 1, 2014

 Begin Construction

August 1, 2014

 Substantial Completion

February 1, 2015

Schedule

 Water Treatment Plant

 Conceptual Design Meeting with KYDOW

August 1, 2014

 Preliminary Design Phase

August 1, 2014 – January 31, 2015

 Submit Preliminary Engineering Report

February 3, 2015

 Meeting with WMU to present Final PER

February 14, 2015

 Submit Environmental Permits

February 14, 2015

 Submittal to KY Division of Water

February 14, 2015

 Presentation to WMU Board

February 21, 2015

 Final Design Phase

January 1 – May 15, 2015

 Advertising / Bidding Phase

May 15 – June 15, 2015

 Award Construction

July 1, 2015

 Begin Construction

July 1, 2015

David F. Schrader, PE Bell Engineering dschrader@hkbell.com 859/278-5412